<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Document</title>
  </head>
  <body>
    <script>
      /*split */
      (function () {
        let str = 'How are you doing today?';
        console.log(str.split(',')); //["How are you doing today?"]
        console.log(str.split(' ')); // ["How", "are", "you", "doing", "today?"]
        console.log(str.split(' ', 3)); // ["How", "are", "you"]
      })();
    </script>
  </body>
</html>
